AB East does not report any financial expenses or financial income. The company's turnover is $ 2,400,000, operating expenses are $ 2,280,000 and capital employed is $ 1,500,000

a) Calculate the profit margin b) Calculate the rate of capital turnover c) Calculate the return on capital employed d) If the profit margin decreases by one percentage point, then how large must the capital turnover rate be in order for the return on capital employed not to change?